1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus tenuis (Buchanan) Á.Löve & Connor

        This species is accepted, and its native range is New Zealand.

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Basal innovations extravaginal. Culms decumbent; weak; 50-100 cm long. Ligule an eciliate membrane; truncate. Collar glabrous. Leaf-blades flat, or conduplicate; 15-30 cm long; 1-2 mm wide; flaccid. Leaf-blade surface smooth; glabrous.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 10-15 cm long; bearing 6-10 fertile spikelets on each. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear. Rhachis internode tip flat. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 5-10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 8-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-3 mm long; sparsely hairy. Floret callus bearded.
    Fertile
    Spikelets comprising 5-10 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 8-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-3 mm long; sparsely hairy. Floret callus bearded.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 7-10 mm long; 1 length of upper glume; coriaceous; without keels; 3-5 -veined. Lower glume apex setaceously attenuate. Upper glume lanceolate; 7-10 mm long; coriaceous; without keels; 3-5 -veined. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma lanceolate; 9-11 mm long; coriaceous; 3-5 -veined. Lemma surface scaberulous; rough above. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 30-40 mm long overall. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3; 2-3 mm long; yellow. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Australasia: New Zealand.
    Reference
    Triticeae. Connor 1994.
    Diagnostic
    Callus beard in a complete ring.

    Distribution

    Native to:

    New Zealand North, New Zealand South

    Elymus tenuis (Buchanan) Á.Löve & Connor appears in other Kew resources:

    First published in New Zealand J. Bot. 20: 183 (1982)

    Accepted by

    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0